Steam-boiler-feeding device.



A. NELSON.

STEAM BOILER FEEDING DEVICE.

APPLICATION FILED SEPT. 26, 1911.

1,055,485, Patented Mar.11,1913.

I I II IIIIIIIIIH I IIIIIIII.

IIIIIII WITNESSES:

ATTORNEY UNITED STATES PA TENT OFFICE.

ANDREW NELSON, OF PORTLAND, OREGON.

STEAM-BOILER-FEEDING DEVICE.

To all whom it may c0ncem:

Be it known that I, ANDREW NnLsoN, a citizen of the United States,residing at Portland, in the county of Multnomah and State of Oregon,have invented certain new and useful Improvements inSteam-Boiler-Feeding Devices, of which the following is a specification.

My invention relates to means for governing the feeding of water to'theboiler units of a steam plant, and the object of my invention in thefirst instance is to provide means for connecting a plurality of boilerunits with a single injector or pump.

My second object is to automatically govern the flow of water from saidpump to each boiler unit.

A further object is to provide means for utilizing steam from eachboiler for operat ing said pump and for actuating said governing means.

These objects and the further advantages of my invention are clearly setforth in the following description and illustrated in the appendeddrawing, of which:

Figure 1 illustrates, partly in section, the construction of theprincipal parts of my device, and Fig. 2 is a diagrammatic view of awater feed system embodying my invention.

In the drawing a, Z) represent the boilers, 0, (Z the water columns, ande the pump. The boilers are by pipes f, 9 connected with the watercolumns, and the water level is registered in the water gage ii in theusual manner. Centrally mounted in each water column is a perpendicularrod 2' on which a float j is free to slide. Rod 2' snugly fits thecentral perforation of float j, and is preferably provided withscrewthreads is, adapted to prevent the mineral sediments of the waterfrom forming a scale on the rod, and

thereby to interfere with the free action of F nation of a plurality ofboilers adapted for the float. The upper surface of the float is by thepressure of the water caused to seat in the flaring mouth Z of a pipe mwhich extends through the wall of the water column. From the top of thewater column leads a pipe 01 to the steam chamber of the boiler.

As the water level in the boiler and column sinks, float is also causedto sink, permitting the steam entering the column through pipe n toescape into pipe m. Mouth Z of pipe m is provided with a plurality ofvery fine apertures 0, which per- Specification of Letters Patent.

Application filed September 26, 1911.

Patented Mar. 11,1913.

Serial No. 651,474.

mit the steam to exert a light pressure on the top of the float, therebyinsuring the instantaneous unseating of the float, when the water leveldrops.

The steam passes from pipe m through pipe 70, past check valve 9, andthrough pipes s, t to the pump. Or from the second column (Z throughpipes t and a, past check valve u, and by pipe 8 to the pump. Fromcolumn 0 and pipe m the steam is also free to pass into chamber a: ofvalve mechanism 11 thus creating a pressure on the spring-held stem-head2 of valve 2 suflicient to unseat said valve, whereby water from thepump, flowing through pipe 3, is free to pass said valve and to enterboiler a. In the same manner the water from the pump is caused to passvalve 4 and to enter boiler 6. Check valves 5, 6, interposed between theboilers and the valves y, 4, prevent back-pressure from the boilers.

From the foregoing description it is seen, that the two boiler units aresupplied from a single pump, and it is obvious that I can add as manyboiler units as conditions require. The system of check valves shownprevent any disarrangement of the steam or water circulation, and it isreadily seen, that the pump is supplied with steam power at the ratesuch power is required, each boiler delivering its own quota of steam.

The construction thus described is very substantial and precludes anydamage to the steam plant, inasmuch as any disarrangement of the workingparts results in the continuous fiow of steam and water, which will beindicated by the rise of water in gage h, and which can be checked byclosing one of the valves 7, 8. Failure to close said valves in timeonly results in the flooding of a boiler.

I claim: 1. In a feed regulator system, the combidifferent degrees ofsteam pressure, a single pump common to all of said boilers, automaticmechanism connected with said pump and said boilers for the purpose ofactuating said pump by steam from either boiler, and

means connected with said pump for selectively directing the flow ofwater from said pump into the boilers including an automatic valvehaving connection with the steam space of the boiler of lowest pressure.

2. A feed regulator'system comprising a plurality of boilers, a steamcontrolled hyclraulic pump common to all of said boilers, meanscontrollable by the water levels of the respective boilers for throwingsaid pump into action, and mechanism for selectively directing the Howof water from said pump into one of said boilers to the exclusion of theother, said mechanism comprising branches leading to the boilers'and ofwhich one branch is provided with a check valve and the other branch isprovided with an automatic valve having connections whereby it may beoperated by steam from its re spective boiler.

3. A feed regulator system comprising a plurality of boilers adapted fordifferent degrees of steam pressure, a steam controlled pump common toall of said boilers, means controllable by the respective levels ofwater in the difi'erent boilers for supplying steam from said boilers tosaid pump for the pur pose of actuating the latter, and mechanism forselectively directing water from said pump into the boilers, includingconnections to the boilers from the pump, and a steam controlled valvein the said connections which lead to the boiler of lowest pressure.

l. In a feed regulator system, the combination of high and low pressureboilers, a single pump common to the boilers, valved connections betweenthe steam spaces of the boilers and said pump and including.an automaticmechanism at each boiler controlled by the level of the water therein,and a water connection leading from the pump and having branchesextending into the boilers, said branches of the low pressure boilerincluding an automatic valve actuated by the steam from said boiler, andsaid branch of the high pressure boiler including a check valve adaptedto be held closed by the pressure of the boiler when the said steamactuated valve is open.

In testimony whereof I have hereunto set my hand.

ANDREW NELSON. lVitnesses T. F. BRADSHAW, IRENE MOORE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

a Washington, D. G.

